CN202131980U

CN202131980U - Roller bit with check valve

Info

Publication number: CN202131980U
Application number: CN201120242014U
Authority: CN
Inventors: 颜子盛; 章文军
Original assignee: Hubei Milalion Metallurgical Machinery Technology Co Ltd
Current assignee: Hubei Milalion Metallurgical Machinery Technology Co Ltd
Priority date: 2011-07-11
Filing date: 2011-07-11
Publication date: 2012-02-01
Anticipated expiration: 2021-07-11

Abstract

A roller bit with a check valve is disclosed, comprising a bit thread (1), an oil filling pipe (4), a bearing (5) and a cone (6), and further comprising a check valve with a hinge structure composed of a housing (2), a dowel (8), two hinge sheets (7) and a reset spring (9), wherein the housing (2) is closely sleeved in the bit thread (1); the dowel (8) is horizontally fixed on the inner diameter of the housing (2); the shape of the hinge sheet (7) is a semicircular shape having a diameter equal to the inner diameter of the housing (2); the reset spring (9) is sleeved on the dowel (8); and the both ends of the reset spring (9) are fixed on the two hinge sheets (7) respectively. The roller bit with the check valve provided by the utility model only allows a high-pressure gas stream or water stream to pass unidirectionally, so that the phenomenon that rock cuttings in a hole flow backwards due to an instantaneous negative pressure formed by the sudden stopping of a drilling machine can be prevented, the bit bearing can be efficiently protected, and the service life of the bit can be prolonged; moreover, the check valve is simple in structure, convenient to use, and low in cost.

Description

A kind of rock bit that has non retern valve

Technical field

The utility model relates to a kind of rock bit, and particularly a kind of rock bit that has non retern valve belongs to the drilling rig technique field.

Background technology

Existing mining cone bit is generally jet nozzled rock bit, promptly utilize High-Pressure Water or air-flow to drill bit cool off, chip removal, cleaning etc.During drill bit work, High-Pressure Water or air-flow produce the erosion effect to bottom rock on the one hand from the high fast direction of blast tube shaft bottom; The addi-tional crusher rock; On the other hand, high-speed jet is carried broken landwaste and around drill bit, is dispersed, thereby in time, promptly gets rid of the landwaste in the boring.It is inner that the High-Pressure Water of injecting from blast tube or the sub-fraction of air-flow get into bearing via oil fuel tube, is used for cooling and cleaning to bearing, prevents bearing running hot and stopped up by foreign matter, influences the use of bearing.

But also there is obvious defects in existing jet nozzled rock bit: High-Pressure Water or air-flow are formed by the air compressor compression, because artificial or mechanical, phenomenon possibly appear shutting down suddenly in air compressor in still working; Can form instantaneous negative pressure in the blast tube this moment; Cause landwaste in the hole to pour in down a chimney and cause in the drill bit, and get in the bearing, have a strong impact on the work of bearing along blast tube; Significantly increase friction, the loss of generation significant amount of energy, reduction rig operating efficiency that gear wheel rotates; More serious is causes the quick wearing and tearing of bearing and damages bearing arrangement, reduces the application life of bearing and even drill bit, increases the use cost of drill bit greatly.

Summary of the invention

Landwaste in the unexpected shutdown that the purpose of the utility model is to overcome the air compressor machine that existing rock bit exists causes holing pours in down a chimney to bearing, influence use, the destruction bearing arrangement of bearing; And significantly reduce the shortcomings and deficiencies in the application life of bearing and drill bit; A kind of mining cone bit that has non retern valve is provided; Can, air compressor machine close gas-liquid channel when shutting down suddenly; Stop landwaste to pour in down a chimney to bearing, effectively protect bearing and drill bit structure, increase the service life, practice thrift use cost.

The utility model for realizing the technical scheme that technical purpose adopts is:

A kind of rock bit that has non retern valve comprises drill bit screw thread, bearing and gear wheel, is provided with oil fuel tube in the said bearing; It is characterized in that: said rock bit also comprises non retern valve, and said non retern valve comprises shell, and the hinge structure of being made up of pin, two page or leaf sheets and back-moving spring; Said shell is a ring-type, its external surface and stationary fit of drill bit thread inner surface or interference fit, and said pin is horizontally fixed on the interior diameter of shell; Said lamellar shape is the semicircle that diameter equates with internal diameter of outer cover; Said page or leaf sheet and pin are hinged, and said back-moving spring is socketed on the pin, and the two ends of said back-moving spring are fixedly connected on respectively on two page or leaf sheets.

A kind of rock bit that has non retern valve, the thickness of said page or leaf sheet is 0.5-3mm.

Compared with prior art; The characteristics that the utlity model has are: in the drill bit screw thread non retern valve is installed; Only allow that high pressure draught or current are unidirectional to be passed through; Can prevent that air compressor machine from shutting down suddenly that landwaste pours in down a chimney phenomenon in the hole that the instantaneous negative pressure of formation causes, can effectively protect bearing and drill bit structure, prolong application life of bearing and drill bit, and non retern valve be simple in structure, easy to use, with low cost.

Description of drawings

Fig. 1 is the structural representation of the rock bit of the utility model band non retern valve.

Fig. 2 is the A-A sectional view of Fig. 1.

Wherein: drill bit screw thread 1, shell 2, blast tube 3, oil fuel tube 4, bearing 5, gear wheel 6, page or leaf sheet 7, pin 8, back-moving spring 9.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described further.

Referring to Fig. 1 and Fig. 2; The rock bit that has non retern valve that the utility model provides; Comprise drill bit screw thread 1, blast tube 3, oil fuel tube 4, bearing 5 and gear wheel 6; Blast tube 3 is positioned at the drill bit screw thread, at the bottom of blast tube 3 high fast direction holes, realizes the effect of chip removal and addi-tional crusher through the High-Pressure Water of compressor compresses or air-flow.Be provided with oil fuel tube 4 in the bearing 5, an end of oil fuel tube 4 leads to the inside of gear wheel 6, and high remperature grease inputs to bearing 5 through oil fuel tube 4, the effect of play lubricating bearings, reducing friction.

Be provided with non retern valve in the drill bit screw thread 1.Non retern valve is the hinge structure of being made up of shell 2, pin, two page or leaf sheets 7 and back-moving spring 9, is processed by metal material.Shell 2 is socketed in the drill bit screw thread 1, and its connected mode is stationary fit or interference fit.Page or leaf sheet 7 is shaped as the semicircle that diameter equates with shell 2 internal diameters, and thickness can be 0.5-3mm, and page or leaf sheet 7 is hinged with pin 8.Pin 8 is horizontally fixed on the interior diameter of shell 2, socket back-moving spring 9 on the pin 8, and the extension at back-moving spring 9 two ends is separately fixed on two page or leaf sheets 7.During the drill bit inoperative, page or leaf sheet 7 is in horizontal closed condition under the effect of back-moving spring 9.During drill bit work, the high fast direction non retern valve of High-Pressure Water or air-flow, its impact force overcomes the elastic force of back-moving spring 9, opens page sheet 7, the beginning operate as normal.When air compressor is shut down suddenly because of artificial or mechanical reason; High-Pressure Water or air-flow interrupt; Page or leaf sheet 7 reverts to horizontal closed condition immediately under the elastic force effect of back-moving spring 9; Thereby landwaste pours in down a chimney to drill bit in the hole that the instantaneous negative pressure that prevents formation in the shell 2 causes, and particularly pours in down a chimney to bearing 5, protects bearing and drill bit structure effectively.

Combine accompanying drawing that the embodiment of the utility model is specified above; But the utility model is not limited to the foregoing description; In the ken that those of ordinary skills possessed, can also make various variations not breaking away under the utility model aim prerequisite.

Claims

1. rock bit that has non retern valve; Comprise drill bit screw thread (1), bearing (5) and gear wheel (6), be provided with oil fuel tube (4) in the said bearing (5), it is characterized in that: said rock bit also comprises non retern valve; Said non retern valve is the hinge structure that shell (2), pin (8), two page or leaf sheets (7) and back-moving spring (9) are formed; Said shell (2) is a ring-type, its external surface and drill bit screw thread (1) inner surface stationary fit or interference fit, and said pin (8) is horizontally fixed on the interior diameter of shell (2); Said page or leaf sheet (7) is shaped as the semicircle that diameter equates with shell (2) internal diameter; Said page or leaf sheet (7) is hinged with pin (8), and said back-moving spring (9) is socketed on the pin (8), and the two ends of said back-moving spring (9) are fixedly connected on respectively on two page or leaf sheets (7).

2. a kind of rock bit that has non retern valve according to claim 1 is characterized in that: the thickness of said page or leaf sheet (7) is 0.5-3mm.